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EARTH SOIL RESISTIVITY METER


GEOHM C Earth Resistivity Meter Tester.
GEOHM C Compact, handy, menu-driven soil resistance, resistivity, earthing measuring instrument
for 3 and 4-wire connection with continuous monitoring of interference voltage and earth electrode and probe resistance with indication if allowable limit values are exceeded.
Complete indication of all necessary values at a large dot matrix display, or warning with 4 LEDs.
Easily comprehensible, simple operation with 4 keys

Soil resistivity meter tester. Earth resistivity.

Soil Earth resistance, resistivity, earthing measuring instrument

Our Price: Contact us for pricing
Phone: 253-927-6186
866-318-6186
Fax: 253-927-6189
email: sales@hotektech.com
  • Earth resistance measurement in 5 ranges up to 50 kOhm
  • Voltage measurement from 10 to 250 V
  • Frequency measurement from 45 to 200 Hz
  • Battery monitoring and self-test
  • Integrated memory with IrDA interface
  • Factory calibration certificate
  • Extremely rugged, two-component housing
  • per VDE 0413 Part 5, EN 61557-5

Applications

The GEOHM C is a compact instrument for the measurement of ground resistance in electrical systems in accordance with:

DIN VDE 0100 Installation of power systems with nominal voltages of up to 1000 V
DIN VDE 0141 Grounding in AC systems with nominal voltages of greater than 1 kV
DIN VDE 0800 Installation and operation of telecommunications systems including data processing systems: equipotential bonding and grounding

Testing of lightning protection systems in accordance with DIN VDE 0185
The instrument is also capable of determining soil resistivity which is essential in calculating 
dimensions for grounding systems.
It can thus be taken advantage of for simple, geological surveys, and for the planning of grounding systems.
Beyond this, ohmic resistance can be measured at both solid and liquid conductors, as well as internal resistance at conductive elements, as long as these are capacitance and induction-free.

Special Functions

  • Hold function: The measurement value is frozen at the display after the measurement key is released.

  • Storage of measurement values to memory

  • Data interface for the transmission of measurement values and for software updates

  • Convenient report generating software, can be expanded into a comprehensive database

Earthing resistance is measured with the GEOHM C by means of the ammeter-voltmeter test method.
The battery powered, potential-free constant power source (quartz controlled square-wave generator) delivers constant current of up to 10 mA at a frequency of 128 Hz to the measuring ranges.
In the interest of safety, maximum test voltage at the terminals is limited to 50 V with reference to earth.

Constant test current travels via terminal E through the earth electrode whose resistance RE is to be measured, through the auxiliary resistor RH and finally to terminal H. The voltage drop which occurs due to earthing resistance RE, and which is measured at terminals ES or E and S, is first fed first to an electronic filter which is synchronous to the generator, and then to a synchronously controlled rectifier in order to eliminate influences caused by polarization voltages and stray alternating currents which are present in the soil to the greatest possible extent.

The earthing resistance to be measured is proportional to the voltage drop. It is displayed directly at the LCD in digital format.
Crucial operating conditions are continuously monitored for possible errors. 
The presence of interference voltage and values in excess of allowable auxiliary earth conductor resistance at the external current circuit are signaled by means of LEDs. Probe resistance at the voltage circuit is measured each time a measurement is started. If the allowable value is exceeded, the appropriate LED lights up. Excessively low battery voltage and over-ranging are indicated at the LCD. 

Please email sales@hotektech.com or call 253-927-6186 if you are interested in a purchase, or
  need additional information.

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